Revolving screen.



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REVOL-VING SCREEN.

(Application filed Oct. 25, 1899.)

(No Model.)

2 Sheets-Sheet I.

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No. 694,565. Patented Mar.l 4`, 1902.

v. w. MASON, 1n'. BEVOLVING SCREEN.

(Application led Oct; 25, 1899.)

I (no inode'l.) A 2 sheen-sheet l2.

I x l A' lill l UNITED STATES PATENT OFFICE.

VOLNEY W. MASON, JR., vOENEWY YORK, Y., ASSIGNOR TO TAYLOR IRON AND STEEL OO., OF4 HIGHBRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY. Y I Y REvoLvlNe SCREEN.

SPECIFICATION forming part of Letters Patent No. 694,565, dated March 4, 1902.

Y Application filed October 25, 1899. Serial No. 734,75 7. (No model.)

To all whom t may concern: .l ceive the end thrust ofthe inclined revoluble Beitknown that I, VOLNEY W. MASON, Jr., cylinder. Fig. 9 is a detail showing one of of New York, county of New York, and State lthe end rings of the frame of the cylinder, of New York, have invented an Improvement and Fig. l is a detail showing the guard on 55 in Revolving Screens, of which the following the longitudinal bar of the frame.

description, in connection with the accompa- The base ofthe machine, as herein shown, nying drawings, is a specification, like characconsists of a pair of parallel chan nel-iron bars ters onV the drawings representing like parts. d a', set lengthwise the machine, and two pairs This invention relates to revolving screens of similar channel-iron bars b b', placed on 6o io especially adapted for heavy Work-such, for said bars a 0;' and secured thereto, there being instance, as screening stone; and it has for one pair of such bars b b near each end of the its object to provide improved'means for rebarsa d'. A pair of antifriction-rolls cc' are sisting the end thrust of the inclined revoluprovided for supporting the lower end of the ble cylinder, which is independent of the inclined revoluble cylinder, and a similar 65 driving mechanism, and in addition to repairof antifriction-rollsdd are provided for lieving the driving mechanism of the strain supporting the upper end of said cylinder. very materially reduces the power required A pair of antifriction-rolls c c are secured to revolve the cylinder and also reduces the to or mounted upon horizontal shafts sup- Wear of the parts; also, to provide an imported in bearingsprovidedfor theminbrack- 7o zol proved form of roller-bearing support for the ets or stands c2, erected upon the bars b b,

revoluble cylinder; alsoto so construct the and said antifriction-rolls are made rustoapparatus that the parts subjected to the conical, as shown, to adapt them to contact greatest wear are readily removable in order with a roller-receiving surface 30, which is that they may be replaced by new parts whenprovided on the outer side of a ring secured 75 everdesired; also,toprovidesectional screento the lower end of the inclined cylinder. plates of novel construction which may be The pair of antifriction-rolls d d are secured removed whenever desired;'also, to provide to or mounted upon horizontal shafts supthe revolving cylinder, withVA an improved ported in bearings provided for them in brackforin of ring having sprocket-teeth whereby ets or stands d2, erected upon the bars b b at 8o 3o the cylinder may be driven by means of a the` opposite end of thecylinder, and said sprocket-chain; also, to provide an improved antifriction-rolls are likewise made frustoform of conducting-chute for delivering the' conical, as shown, to adapt them to contact stone to the screen; also, to improve and simwithal roller-receiving surface 40, which is plify the construction of the apparatus in provided on the outer side of a ring secured 85 many other particulars, as will be hereinafter to the upper end of the inclined cylinder. set forth. The angle given to the conical faces of the Figure l shows in side elevation a revolvantifriction-rolls c c and d d is the sameas ing screen embodyingmy invention. Fig. 2 the angle of inclination of the revoluble cylis a cross-section of the revoluble cylinder, inder, and antifriction-rolls of such form 9o 4o taken on the dotted line Fig. l, looking have a greater peripheral speed on one side toward the left. Fig. 3 is a cross-section of than the other and being disposed, as herein the revoluble cylinder, taken on the dotted drawn, relative to the inclined cylinder have line y y, Fig. l. Fig. l is a longitudinal seca tendency to work the cylinder upward as tion of a portion of the upper end of the cylthey revolve, and thereby assist in reducing 95 inder. Fig. 5 is a similar longitudinal verti- 'the downward thrust of the inclined cylincal section of a portion of the lower end of der. At the lower end of the cylinder an anthe cylinder. Fig. 6 is a View showing the tifriction-roll e is provided, which is adapted lower end of the revoluble cylinder. Fig. 7 toturn on a vertical axis in alinement with is a view showing the upper end of the revothe perpendicular radius of the cylinder, and roo 5o luble cylinder. Fig. 8 is a vertical section of said roll is made frusto-conical and is adaptthe antifriction-roll which is adapted to reed to contact with or engage a roller-receiving surface 50, provided on a ring secured to the lower end of the cylinder. The angle of the conical surface of the rolle is at right angles to the angle of inclination of the cylinder. The antifriction-roll e (see Figs. l and S) is mounted to revolve freely on a stud e', rising vertically from and supported by a bracket or frame e2, which is bolted or otherwise secured to the bars b h', and said bracket or frame e2 is formed with an oil receptacle or reservoir e3 beneath the antifriction-roll e, down into which the hub e4 of said roll projects, said hub having perforations @20 through it, whereby the oil contained in said receptacle e3 has free access to the bearing e of said roll. The roll e is recessed on its under side to allow the oil-reservoir e3 to project up into it, and said reservoir c3 lightly contacts with said roll e. The roll e has a hole 2 through it communicating with said oil-receptacle, whereby the oil may be introduced into said receptacle whenever desired, or any other means may be provided whereby the oil may be introduced. A dustexcluding cap or plate e5 is secured to the upper end of said stud e', which is made large enough to practically cover the roll e, andit is disposed above said roll, so as to lightly contact therewith, and whenever it is desired to introduce oil into the oil-receptacle said plate will be removed. The parts will of course be fitted as closely as practicable for the exclusion of the dust.

The inclined revoluble cylinder consists, essentially, of a frame having sectional screenplates secured fo it and having end rings formed or provided with roller-receiving surfaces for the antifriction-rolls. The frame of the cylinder, as herein shown, consists, essentially, of two end rings fg, made substantially alike, and several longitudinal bars h, connected at their ends to said end rings f g, three such bars being herein shown. Each end ring j' and g is herein shown as formed or provided on its outer side with a number of pairs of outwardly-projecting ears 3, each ring being herein shown as having three pairs of ears, and said rings also have a circumferential flange f2 g2, formed with slots opposite the spaces between the ears of each pair, and the longitudinal bars It, which connect said end ringsfand g together, are made as long as desired, and the ends of said `bars 7L are placed in the slots in the flanges f2 g2 and in the spaces or recesses formed or provided between the ears 3 on the rings, be-` comprises a number of screen-plates i, which are secured to the bars 7i., and as three bars are herein shown each perforated division will comprise three screen-plates, and as said screen-plates cach form but a section only of one of the perforated divisions they are herein termed sectional screen-plates. Each screen-plate i has formed along each side or edge an outwardly-projecting flange i', which is adapted to abut against the longitudinal bar h and to be secured to said bar by bolts 5 passing through the flanges and through the bars. Thus any one of the screen-plates t' may be removed whenever desired. The screen-plates i also have flanges along their opposite sides or edges, as shown at i2, which are adapted to pass beneath the hars h, and the flanges i2 of two adjacent screen-plates will abut together, as shown in Fig. 3, and thereby present a smooth surface on the interior of the cylinder, which effectually prevents the edges of the screen-plates from wear and also protects the bars z. rlhe screenplates of each division will vary in size, as usual in screens of this kind, and the perforations of said screen-plates will also vary in size. At the upper end of the cylinder the screen-plates terminate adjacent to or may abut against the end'ring r and the screenplates of each perforated division may abut against the screen-plates of the next division; but at the lower end of the cylinder the screenplates of the endmost division terminate a short distance above or at one side of the end ringf to leave an opening p for the tailings. Thus it will be seen that the end ring f is supported a short distance beyond the end ofV the lowermost perforated division. Between each perforated division a circular guard 7c is provided, which is located outside of the cylinder opposite the abutting ends of the screen-plates and which projects outwardly for a short distance-as, for instance, to the outer edges of the bars hand said guards Z; assist in preventing the stone falling from one perforated division into the bin of the next division. These circular guards 7o are made in sections, and, as herein shown, each guard is composed of three sections, and each section has formed upon it at each end a foot 7a', which abuts against the longitudinal har 7L, and bolts pass through the feet 7c and the bars 7L to thereby rigidly secure said sections in position. The circular guards being thus rigidly secured to the longitudinal bars h serve to stiifen said bars, and in this respect they form a cooperative part of the frame which supports the perforated cylinder. It will be understood, however, that said guards 7c will subserve this purpose regardless of the particular points along the bars that they may be attached.

At the lower end of the inclined revoluble cylinder a ring mis fitted into the end ring fand is secured to said end ringfby bolts U or otherwise, and said ring m has formed on its outer side a roller-receiving surface 30, and it has formed on its end a roller-receiving surface 50. The ring m has also formed on it an outwardly-projecting flange '1n/,which abuts against the end ring f, although such flange maybe omitted, if desired. The rollerreceiving surface 30 is so disposed as to cooperate with the antifriction-rolls c c',and said rolls while in engagement therewith support the lower end of the inclined cylinder, and the roller-receiving surface on tho end of the ring m bears upon the antifriction-roll e,

the end ring g and secured thereto by bolts. or otherwise, and said ring or, has formed on its outer side a roller-receiving surface 4 0,

which coperates with the antifriction-rolls d d', and said ring n has lalso an inwardlyprojecting iiange n2, to which a ring o is secured, said ring o having formed or provided on it a series of sprocket-teeth o', adapted to receive a sprocket-chain, (not shown,) by,

means of which the cylinder is revolved. It will vbe seen that the ring o is readily detachable from the ring n and also that said, ring n is readily detachable from the end ring g,

and, furthermore, it will be seen that the ring m at the opposite end of the cylinder is also readily detachable from the end ring f. The longitudinal bars h necessarily cross the opening p, and as the cylinder revolves the tailings which drop through said opening have a'tendency to wear away said bars h, and

hence I have provided guards p', which are adapted to be placed vupon said bars h at said opening to prevent such wear. These guards 29 plate having earson it which astride the bar h, and said guards p are secured to said bars by bolts which pass through the ears and through the bars.

At the upper end of the inclined cylinder l a conducting-chute is provided for conducting the stone to thecylinder, and said chute consists, essentially, of a bottom plate u, having side iianges or ears and two side plates u u2, also having side flanges or ears, and bolts uniting the side flanges or ears to therebyde.-l

tachably secure the side plate to the bottom plate and form a chute the bottom and both sides of which are separable, and said bottom plateuis secured to the upper end of ya bracket us, which is adj ustably secured to a stand n4, mounted on the base of the apparatus.

I claiml. In a revolving screen, an inclined revoluble screen-cylinder having means for supporting its lowermost end, consisting of a pair of cylinder-supportin g rolls engaging the side of the cylinder, andan end-thrust roll engaging the end of the cylinder, disposed substantially midway between said cylinder-supporting rolls and revoluble on an axis substantially in alinement with the perpendicular radius of said cylinder, substantially as described.

2. In a revolving screen, an inclined revo` as herein shown, each consist of a fiat luble screen-cylinder having means forsupporting its lowermost endconsisting of a pair of frusto-conical cylinder-supporting rolls engaging the .side of the cylinder, the angle of the conical engaging face of each roll being the same as the angle of inclination of the cylinder, and an end-thrust roll engaging the end of the cylinder, disposed substantially midway between said cylindersupporting rolls and revolublepon an axis substantially in alinement with the perpendicular radius of said cylinder, the angle of the conical face of said roll being at right angles to the angle of inclination of thc cylinder, substantially as described.

3. In a revolving screen, an inclined revoluble screen-cylinder having means for supporting its uppermost end, consisting of a pair of frusto-conical cylinder-supporting rolls engaging the side of the cylinder, the angle of the conical face of each roll being the same as the angle of inclination of the cylinder, and means for supporting itslowermost end, consisting of a pair of frusto-conical cylindersupporting rolls engaging the side of the cylinder, the angle of the conical engaging face of each roll being the same as the angle of inclination of the cylinder, and a frusto-conical end-thrust roll engaging the end of the cylinder, disposed substantially midway between said cylinder-supporting rolls and revoluble on an axis substantially in alinement with the perpendicular-,radius of said cylinder, the angle of the conical face of said roll being at- 'right angles to the angle of inclination of the cylinder, substantially as described.

4. In-a revolving screen, an inclined revoluble cylinder, a roll at its lower end adapted to receive the end thrust of said cylinder, a recessr formed in the under side of said roll, a stud on which said roll is mounted, and a supporting frame orbracket provided with an oil-receptacle, the outer side wall of said receptacle projectingup into the recessin said roll, and the hub of-said roll projecting dow'n into said receptacle, substantiallyV as described. A

5. In a revolving screen, an inclined revoluble cylinder, a roll at its lower end adapted to receive the end thrust of said cylinder, a recess formed in the under side of said roll, a stud on which said roll is mounted, and a supporting frame or bracket having an oilreceptacle, the outer side wall of said receptacle projecting up into the recess in said roll, and the hub of the roll projecting down into said receptacle,.said roll also having a hole through it communicating with said oilreceptacle, substantially as described.

6. In a revolving screen, an inclined revoluble cylinder, a roll at its lower end adapted to receive the end thrust of said cylinder, a

stud on whichsaid roll is mounted, supported by a frame or bracket having an oil-receptacle, the hub of said roll projecting down into said receptacle, said roll having a hole through it communicating with said oil-receptacle,

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and a dust-excluding plate secured to said stud above the roll,substantiallyas described.

7. In a revolving screen, an inclined revolnble cylinder consisting of a frame comprising end rings f, g secured together by longitudinal bars h, and sectional screen-plates secured to said bars 7i, to present perforated divisions, an end ring m fitted into the ring f of the frame and secured thereto by bolts and having a circumferential iiange m/ abutting against the end of said ring f, and also having a roller-receiving surface 30, and a roller-receiving surface 50, a pair of cylindersupporting rolls engaging said roller-receiving surface 30, and a roll engaging said rollerreceiving surface 50 turning on a vertical axis in alinement with the perpendicular ra.- dius of the cylinder, which receives the end thrust of said cylinder, substantially as described.

S. In a revolving screen, an inclined revoluble screen-cylinder having means for supporting one of its ends, consisting of a pair of cylinder-supporting rolls, and a thrust-roll which receives the end thrust of the screencylinder disposed substantially midway between said cylinder-supporting rolls and revoluble on an' axis substantially in alinemcnt with the perpendicular radius of said cylinder, substantially as described.

9. In a revolving screen, an inclined revoluble cylinder having a frame comprising several longitudinal bars and having near its lower end an opening for the tailings, and guards p' which protect said longitudinal bars at said opening, substantially as described.

lO. In a revolving screen, an inclined revoluble cylinder and a conducting-chute composed of a bottom piece having side flanges or ears, a support therefor, side pieces having side flanges or ears, and bolts uniting the side fianges or ears to thereby detachably connect the side pieces to the opposite sides of the bottom piece, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

VOLNEY XV. MASON, JR.

Witnesses:

B. J. NoYEs, J. L. HUTcHINsoN. 

